The main characters are:
* Joe / Josephine: Played by Tony Curtis, he pretends to be a woman named Josephine to escape mobsters.
* Jerry / Daphne: Played by Jack Lemmon, he also pretends to be a woman named Daphne to escape the same mobsters.
* Sugar Kane: Played by Marilyn Monroe, she is a singer who falls for Josephine.
The film doesn't have a character named George. Perhaps you're thinking of a different film?